from input[type="text"],textarea{
    border: 1px solid #2150ea;
    padding: 10px;
    width: 300px;
    font-size: 16px;
}
input[type="text"]:focus,textarea:focus{
    border: 5px solid red;
}
from>label{
    display: block;
    margin-bottom: 5px;
    font-weight: 700; /* 加粗 */
}
from input[type="submit"]{
    padding: 10px 20px;
    background-color: #a6cef8;
    margin: 10px 0;
}
span{
    font-weight: 700; /* 加粗 */
}
div{
    margin: 10px 0;
}
input[type="radio"]{
    margin-right: 10px;
}
